Sony has admitted that sales of its PlayStation 3 (PS3) console failed to match its expectations this year, but stressed this is "hardly cause for panic".

"I don't think there's any question that there were missteps," PS3 boss Jack Tretton Tretton told MSNBC in an interview published on Monday.

"I fully admit we'd like to have sold more [PS3] units... but I don't think anybody is being honest with you if they say that the first year of any platform goes perfectly according to plan."

While blaming early poor supply as "the biggest disappointment" of 2007, Tretton said the PS3's slow start is "hardly cause for panic" because both the original PlayStation and PlayStation 2 remained popular for 10 years.

"The first year is important, but it's the first inning of a nine-inning baseball game," he said. "You're not going to win many baseball games if you panic when you're down 1-0 in the first inning."

See also:

PS3 review

All console reviews